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Event Date and Time
SHL 215
Vasili Perebeinos, SUNY Buffalo
In recent years, 2D materials, such transition metal dichalcogenides, have attracted much attention due to their excellent transport and optical properties. Using a Bethe-Salpeter equation, we investigate optical and excitonic properties of MoS2 monolayers in an applied in-plane electric field [1]. We predict a quadratic Stark shift and its scaling with the exciton binding energy, determined by the dielectric environment. I will also discuss our recent results on plasmon scaling in graphene nanoribbon arrays as a function of nanoribbon width, spacing between ribbons, and doping level [2]. [1] B. Scharf, T. Frank, M. Gmitra, J. Fabian, I. Zutic, and V. Perebeinos, Phys. Rev. B 94, 245434 (2016). [2] V. Semenenko, S. Schuler, T. Mueller, and V. Perebeinos, ACS Photonics 5, 3459-3465 (2018)